Here’s the good and the bad of Record Store Day in a nutshell: About 100 sleeves of the new “Songs for Slim” 7-inch single have been signed as a thank-you to Twin Cities music lovers by the musicians involved, including Curtiss A, Tim O’Reagan, Jim Boquist and Peter Buck. As of Monday, though, the vinyl to go with the singles — you know, the part with the actual music on it — had yet to arrive from the pressing plant.